Stiebel Eltron TEMPRA24B Electric Electric Tankless Water Heater for 2 Bath Home with 4.10 GPM @ 40° Rise

Item #: BCI390905
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Technical Specs

Installation Guide
Specification Sheet
Approved for Commercial Use Yes
Breaker Needs 60
Collection TEMPRA
Depth 4.63
Direct Vent No
Electronic Ignition Type Yes
Fuel Type Electric
Hardwired Yes
Height 14.56
Ignition Type Electronic
Indoor Installation Yes
Kilowatts 18, 24
Manifolding No
Minimum Flow Rate .58
Number of Breakers 2
Outdoor Installation No
Plug In No
Practical Flow Rate 2.7
Voltage 208, 240
Water Connection 3/4"
Water Pressure (Max) 150
Width 14.5
Wire Size 2x6 / 2x6 Gauge

This product has additional required/recommended options. To configure, add to your cart.

  • Descaling Kit Recommended
  • Isolation Valve Recommended

Electric Tankless Water Heater for 2 Bath Home


  • Unlimited Supply of Hot Water: Keeps heating water instantly as you require. The Tempra(tm) system completely replaces a conventional tank heater with no disruption to your comfort and hot water needs.
  • Saves Energy and Reduces Your Electric Bill: Electric tank type water heaters are subject to stand-by losses which amount to 15 - 20% of the kWH used. Changing to a tankless system results in savings of 15 - 20%.
  • Control Temperature Simply by Setting a Dial: Set the knob on the front cover and enjoy water temperatures between 86 degreeF (30 degreeC) and 125 degreeF (52 degreeC). Change the desired temperature at anytime. Advanced microprocessor technology ensures that the water temperature never deviates from the set point.
  • Sleek Design Saves Space: The Tempra(tm) takes up considerably less space than conventional tank type water tanks and saves valuable living space.
  • Proven Reliability: Stiebel Eltron has an enviable track record of engineering excellence and product quality. The three years parts warranty is unique in the industry. You can depend on the Tempra(tm) for many years to come.
  • Tempra 24 vs. Tempra 24 Plus: The Tempra 24 Plus expands on the Tempra 24 (this model) by adding a pressure balancing feature to the unit. Should a unit be hooked up to more than one application, for example, a shower and a kitchen faucet, the demand for hot water may occasionally exceed the capabilities of the tankless water heater. Should this occur when using the Tempra 24, the water temperature will go down. Should this occur when using the Tempra 24 Plus, the unit will properly lower the cold water pressure to compensate for the demand, resulting in a total drop in water pressure at the shower and kitchen sink faucet, but temperature remains constant.


  • Voltage: 208/240
  • Wattage: 18/24 kW
  • Amperage: 88/100 A
  • Min Circuit Breaker Size: 2x60 / 2x60 A
  • Recommended Wire Size: 2x6 / 2x6 GA
  • Max Temp Inc @ 3.0 GPM: 41/54 degree
  • Working Pressure: 150 PSI
  • Water Connections: 3/4" NPT
  • Dimensions: 14-9/16" x 14-1/2" x 4-5/8"
  • Weight: 18 lbs

Performance Data

  • 4.1 Gpm @ 40°F Rise
  • 3.2 Gpm @ 50°F Rise
  • 2.7 Gpm @ 60°F Rise
  • 2.3 Gpm @ 70°F Rise
  • 2.1 Gpm @ 80°F Rise

Additional Stiebel Eltron Links


This product is listed under the following manufacturer number(s):

  • Electric

*Denotes a finish or option that has been discontinued

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Product Reviews

Rated 5 out of 5 by from Great product Great tankless water heater.... Saved over $50.00 first month on electric bill.... Paid for it self the first year.... Easy to install if your a do it your selfer.... Thanks Ollie
Date published: 2009-02-18
Rated 5 out of 5 by from Love My Tankless Water Heater! I've had this tankless, electric water heater in my house for a few months now. Previously had a propane water heater. I always have hot water. No complaints. It was a smooth transition and I'm completely satisfied with it. Had great customer service from Faucet Direct!
Date published: 2011-02-07

Warranty Info

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